8 7. (25 points) Prove or disprove the following statements: (a) (13 points) For every positive odd integer n, we have n
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8 7. (25 points) Prove or disprove the following statements: (a) (13 points) For every positive odd integer n, we have n
8 7. (25 points) Prove or disprove the following statements: (a) (13 points) For every positive odd integer n, we have n2 +4 is a prime. a T (b) (12 points) There exists a real number number r such that 2r2 - 4r +4<0.
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